I bought this to add more drives to my unRaid server and everything was going well till I tried to clear 1.5TB drives on the 3rd and 4th channels. I was averaging bandwidth of about 65MB/s on the other SATA drives. However, when I got to the drives on the 3rd and 4th channel, the speed dropped to about 6MB/s. This is an unacceptable speed for an array with large drives. Also the 3rd and 4th channels show up as IDE ports even though they have SATA connectors, which leads me to believe this card was originally designed with 2 SATA and an IDE port, and some where along the lines it got modified to have 4 SATA ports.
So if you are thinking about this card for an unRaid box, take a pass or only use the first 2 channels. It is a good price though!Get more detail about Syba SY-PEX40013 PCI Express SATA II 4x Ports RAID Controller Card, JMB Chipset.
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